CVE-2026-49138Public exploitNetwork attack vector

Authenticated SSRF via automatic redirect following

Published Jun 1, 2026 · Updated Jun 1, 2026

SSRF in nanobot web_fetch before 0.2.1 allows remote authenticated users to reach internal hosts through crafted redirects. The tool validates the starting URL, but httpx follows each 3xx Location before the private-address check is applied to the resolved target. Access to a configured path that invokes web_fetch with an attacker-chosen URL is required; the result is unauthorized internal requests and disclosure of returned response data.

CVSS severity5.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in nanobot web_fetch before 0.2.1 allows remote authenticated users to reach internal hosts through crafted redirects. The tool validates the starting URL, but httpx follows each 3xx Location before the private-address check is applied to the resolved target. Access to a configured path that invokes web_fetch with an attacker-chosen URL is required; the result is unauthorized internal requests and disclosure of returned response data.

The record

CVE
CVE-2026-49138
Published
Jun 1, 2026
Updated
Jun 1, 2026
Vendor
Data Intelligence Lab @ HKU
Product
nanobot
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Data Intelligence Lab @ HKU · nanobotversion=0 <0.2.1

Published CVSS scores

5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N
5.0VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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